If your portfolio is invested 40 percent each in A and B and 20 percent in C, what is the portfolio expected return? What is the variance? What is the standard deviation? b. If the expected T-bill rate is 4.90 percent, what is the expected risk premium on the portfolio? Expected risk premium If the expected inflation rate is 4.40 percent, what are the approximate and exact expected real returns on the portfolio? What are the approximate and exact expected real risk premiums on the portfolio